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Name: Tim
Status: Student
Grade: 4-5
Location: N/A
Country: Australia
Date: May 2007

Can gold be found in any other host rock other than quartz?

Gold is often brought into rocks dissolved in hot magmatic waters. As such it can be deposited in any rock that allows the passage of these hot waters through cracks and or primary porosity. As a result you can get what are known as disseminated gold ores where the gold is so fine you cannot see it with the naked eye of even a low power microscope.

In other cases, gold bearing rock may be eroded and the gold re-deposited in other rock types. Again, this may lead to a very low grade of ore, but one that is still economically useable.

Gold can also be mixed with other metallic ores in very small amounts. For many years, New Jersey Lead and Zinc Co., recovered the gold present in their lead/zinc ore by scraping and refining the metallic scale in the furnaces and retorts. The gold paid their expenses and the lead and zinc were pure profit. As a result, they continued to refine ore even in times of poor lead and zinc prices.

As the old saying goes, "Gold is where (and in what rock) you find it".

Bob Avakian

Gold forms few, if any, chemical compounds that are stable in a geological environment. I do not know of any, but there could be. Consequently, metallic gold finds itself in an environment that is most plentiful and non-reactive. Quartz fills those two conditions. I suspect that is why metallic gold is usually found in a quartz matrix.

Vince Calder

From the famous PBS series "The Making of the Continent" (North America), it was given that if you find "greenstone or more particularly greenschist" you are likely to find gold or silver.

Greenstone and Greenschist can be found at the following site:

Steve Sample

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